SURFACE-TREATED ZINC OXIDE POWDER

摘要

PURPOSE: To suppress photocatalyst activities of zinc oxide particles and simultaneously impart them with dispersibility of fine powder by treating the surface of particles of zinc oxide fine powder with an aluminum chelate compound or a cyclic aluminum oligomer. CONSTITUTION: This zinc oxide fine powder is obtained by treating the surface of zinc oxide particles with an aluminum compound or a cyclic aluminum oligomer. One to three molecules ofβ-biketone ligand or especially acetyl acetone asβ-keto ester ligand are preferably used as the aluminum chelate compound. The cyclic aluminum oligomer is a compound having a chemical structural formula expressed by the formula and a cyclic aluminum oxide octylate, a cyclic aluminum oxide stearate and a cyclic aluminum oxide isopropylate are exemplified. In the formula, X is R or OR and R is a 2-13C alkyl.